The gold master was created a few weeks back so the shipped game is less complete in a sense than the fully updated open beta client that many people have.
I'm thinking when we all log into the game on the 23rd blizz will have another minor balancing patch for download, or if not then not long after. Some sweaping changes were made to certain classes during the open beta and its clear that the fine tuning isn't completely done yet and some quest items and other things were not included in beta, I think for the purpose of keeping them somewhat secret before retail.
Bottom line: I guess we'll have to wait and see.